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{"affected_release": [{"advisory": "RHSA-2011:0500", "cpe": "cpe:/a:redhat:enterprise_mrg:1::el5", "package": "kernel-rt-0:2.6.33.9-rt31.64.el5rt", "product_name": "MRG for RHEL-5", "release_date": "2011-05-10T00:00:00Z"}, {"advisory": "RHSA-2011:0833", "cpe": "cpe:/o:redhat:enterprise_linux:5", "package": "kernel-0:2.6.18-238.12.1.el5", "product_name": "Red Hat Enterprise Linux 5", "release_date": "2011-05-31T00:00:00Z"}, {"advisory": "RHSA-2011:0498", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "kernel-0:2.6.32-71.29.1.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2011-05-10T00:00:00Z"}], "bugzilla": {"description": "kernel: dccp: fix oops on Reset after close", "id": "682954", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=682954"}, "csaw": false, "cvss": {"cvss_base_score": "7.8", "cvss_scoring_vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "status": "verified"}, "cwe": "CWE-672->CWE-476", "details": ["The dccp_rcv_state_process function in net/dccp/input.c in the Datagram Congestion Control Protocol (DCCP) implementation in the Linux kernel before 2.6.38 does not properly handle packets for a CLOSED endpoint, which allows remote attackers to cause a denial of service (NULL pointer dereference and OOPS) by sending a DCCP-Close packet followed by a DCCP-Reset packet."], "mitigation": {"lang": "en:us", "value": "For users that do not run applications that use DCCP, you can prevent the dccp\nmodule from being loaded by adding the following entry to the end of the\n/etc/modprobe.d/blacklist file:\nblacklist dccp\nThis way, the dccp module cannot be loaded accidentally, which may occur if an\napplication that requires DCCP is started. A reboot is not necessary for this\nchange to take effect but do make sure the module is not loaded in the first\nplace. You can verify that by running:\nlsmod | grep dccp\nYou may also consider removing the CAP_SYS_MODULE capability from the current\nglobal capability set to prevent kernel modules from being loaded or unloaded.\nThe CAP_SYS_MODULE has a capability number of 16 (see linux/capability.h). The\ndefault value has all the bits set. To remove this capability, you have to\nclear the 16th bit of the default 32-bit value, e.g. 0xffffff ^ (1 << 16):\necho 0xFFFEFFFF > /proc/sys/kernel/cap-bound"}, "name": "CVE-2011-1093", "public_date": "2011-03-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-1093\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-1093"], "statement": "This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not include support for the DCCP protocol. Future updates in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG may address this flaw.", "threat_severity": "Important"}